problems debian woody / lilypond 2.1.27

[Tanguy]

Hello,

i'm running a debian woody.
i used to have a lilypond 2.1.2, which worked fine.
i upgraded to lilypond 2.1.27 and now something seems to 
be broken :(

in my sources.list file i have:
deb http://afavent.elte.hu/~wferi/debian woody main


i tried to convert the source file using convert-ly.
i also ran texhash, i have the same error messages

(i join the first errors, lilypond does not seem to recognize
some commandes, e.g. \property, and does not find the paper16.ly file
the source file for my score worked with version 2.1.2.
Sorry for sending the errors in french, i'll try a quick translation
of the most relevant error messages:

error: can't find file "paper16.ly"
error: unknown string "\property"


)

any help would be very appreciated

err_lily
Description: application/java-vm